I'm new to astronomy (nothing to compare this to), but I have read much before making this purchase and I am not disappointed. I have only used this with a small APO refractor (Orion EON 72mm). Terrestrial use also yields very good results. Stacking the 5x with the 2.5x Powermate resulted in only fair (at best) results - yes, I know, but I had to try. Fit and finish are excellent. If you own an SLR, I recommend the T-ring adaptor as well.
Pros: sharp flat image
Cons: pricey but worth it...
Would recommend: Yes
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